Merge tag 'drm-vc4-fixes-2016-08-29' of https://github.com/anholt/linux into drm-fixes

This pull request brings in fixes for VC4 3D in 4.8, most of which are
covered by testcases.

* tag 'drm-vc4-fixes-2016-08-29' of https://github.com/anholt/linux:
  drm/vc4: Fix oops when userspace hands in a bad BO.
  drm/vc4: Fix overflow mem unreferencing when the binner runs dry.
  drm/vc4: Free hang state before destroying BO cache.
  drm/vc4: Fix handling of a pm_runtime_get_sync() success case.
  drm/vc4: Use drm_malloc_ab to fix large rendering jobs.
  drm/vc4: Use drm_free_large() on handles to match its allocation.